s1='programming'
s2='language'
s3=['SUN','MON','TUE','WED','THU','FRI','SAT']
print("t1: "+(s1[5:7]+' ')*3)
print('t2: '+s1[0:3].capitalize()+s2[0:3].capitalize())
print('t3: '+s1.replace('a','@')+' '+s2.replace('a','@'))
print('t4: '+'|'.join(s3))
